laboratory homogenizer Articles

  • Laboratory And Field Inter-Comparison of O3 Diffusive Samplers

    A field and laboratory inter-comparison of diffusive samplers for measuring ozone (O3) in ambient air was carried out. The objective of this study was the evaluation, according to the EN protocol of validation of diffusive samplers, of the extent of differences between O3 measurements performed by diffusive samplers and the reference method under extreme conditions of influencing factors. Ten ...


  • Sample Size for Laboratory Calibration of Subsurface Neutron Moisture Gauges

    The estimation of adequate sample size is critical to all laboratory methods of calibration of neutron moisture gauges. Neutron gauge response is a function of the true sample geometry rather than an arbitrarily defined spherical geometry. A two-group solution is obtained for neutron flux in a homogeneous, finite, cylindrical sample. The theoretical flux distributions for this solution and for ...


    By ASTM International

  • Sample Handling Strategies for Accurate Lead-In-Soil Measurements in the Field and Laboratory

    ABSTRACT The inhomogenous lead-in-soil matrix can present serious obstacles to accurate sample collection and handling. In typical lead-in-soil measurement, particle size related errors in sampling and sample handling often exceed all other sources of error. The magnitude of error can vary widely depending on the particulate nature of the lead contaminant and the effectiveness of control ...

  • Laboratory and Field Calibration of a Neutron Depth Moisture Gauge for Use in High Water Content Soils

    In recent years radioisotopes have been increasingly used for determining site values of the density and the water content of soils. Since field measurements obtained by neutron moisture gauges are relative, these instruments must be calibrated. Calibration is usually carried out in the laboratory by plotting neutron counting rates versus known water content values of several soil media, ...


    By ASTM International

  • Comparing Field Portable X-Ray Fluorescence (XRF) To Laboratory Analysis Of Heavy Metals In Soil

    ABSTRACT Field portable x-ray fluorescence (XRF) continues to gain acceptance as a complement to traditional laboratory testing of metal contaminated soil. The quality of data produced by field XRF varies with site conditions, soil composition, and sample preparation. Quality assurance protocols for the field method usually require that a number of field samples be split and sent to a ...

  • Precellys application focus cancer research oncology - case study

    Cancer research laboratories working with tumor tissues derived from animal models (1,2) or xenografts (3) face difficulties in homogenizing these tough samples using traditional methods (4). The Precellys homogenizers provides high speed sample disruption based on bead- beating technology for the extraction of DNA, RNA, protein, enzymes and metabolites within minutes. It ensures high ...

  • Heterogeneous catalytic ozonation of cationic dyes using volcanic sand

    This work aims to present experimental results on the treatment of methylene blue contaminated waters using heterogeneous catalytic ozonation promoted by volcanic sand. The effect of pH (2–8), and the presence of radical scavengers (acetate ions) in homogeneous and heterogeneous systems are evaluated at laboratory scale. Heterogeneous catalytic ozonation using volcanic sand increases methylene ...


    By IWA Publishing

  • Soft Oedometer—A New Testing Device and Its Application for the Calibration of Hypoplastic Constitutive Laws

    The problem addressed is how to obtain the material parameters of soils and other granular materials by means of a simple and fast laboratory test which fulfills the requirement of homogeneous specimen deformation. A new laboratory testing device called “soft oedometer,” characterized by an extensible lateral supporting ring, makes it possible to measure not only the vertical but also the lateral ...


    By ASTM International

  • Case study - EPH in soil evaluation study at tank farm site

    Ambient Engineering, Inc. (Concord, MA) used Sitelab to investigate and remediate a former tank farm along Boston Harbor contaminated by a large, subsurface plume of commingled diesel fuel and No. 6 fuel oil. Ambient’s Licensed Site Professional (LSP) had the opportunity – and budget – to evaluate Sitelab against three certified laboratories. Soil samples were collected from ...


    By Sitelab Corporation

  • Comparison of species sensitivity distributions based on population or individual endpoints

    Species sensitivity distributions (SSDs) developed from individual and population endpoints were compared based on simulations and a case study. The simulations were performed with five invertebrate species accounting for the diversity of benthic macroinvertebrate communities in large European lowland rivers and for five benthic invertebrates used as laboratory species. Population growth rate ...


    By John Wiley & Sons, Ltd.

  • Case study - EPH in soil with No. 6 fuel oil

    No. 6 fuel oils (heavy fuel oil, bunker C oil) is often used in industry for heat, steam or power generation. A consultant used Sitelab to investigate two different spill sites contaminated with subsurface plumes of NAPL resulting from leaking underground storage tanks (USTs). Soils were collected from borings using a drill rig and field screened for their EPH aromatic content. Split samples ...


    By Sitelab Corporation

  • Detection of alachlor or atrazine in soy flour

    MATRIX: Soy flour ANALYTES: Alachlor and atrazine RANGE OF DETECTION: Alachlor: 20 to 1000 ppb, Atrazine: 14 to 400 ppb. MATERIALS: Alachlor RaPID AssayÒ kit and Sample Diluent. HS Atrazine RaPID AssayÒ kit and Sample Diluent. Reagents: methanol (pesticide grade); concentrated hydrochloric acid (ACS ...


  • Cavitation reactors provide perfect mixing

    Operations of cavitation reactors are based on activation of ultrasonic cavitation in the thin layer, processed liquid pumped over through the reactor as a result is formed stable dispersion of mixed components. On an entry of reactors, liquid is supplying and it has the greatest volume in a received emulsion. Through the second entry is supplying liquid component. Both entry fittings are located ...


    By GlobeCore Blending

  • Modelling the motion of an internal solitary wave over a bottom ridge in a stratified fluid

    A series of laboratory experiments has been carried out to investigate the passage of an internal solitary wave of depression over a bottom ridge, in a two-layer fluid system for which the upper and lower layer is linearly-stratified and homogeneous respectively. Density, velocity and vorticity fields induced by the wave propagation over the ridge have been measured simultaneously at three ...


    By Springer

  • Aminoglycoside Antibiotics in Feed Apramycin, Gentamicin, Neomycin

    Aminoglycoside antibiotics are among those commonly used in animal feeds to manage intestinal microorganisms. The beneficial effects include improved growth and generally healthier animal populations. Use of antibiotics creates a demand for analytical procedures to verify concentrations in pre-mixes and feeds and in some instances for residue analysis in animal products. This note describes a ...


    By Pickering Laboratories, Inc.

  • Precellys application focus forensic - case study

    Forensic laboratories working with hard samples such as hair [1, 2J, bone [3], teeth, skin, etc. experience difficulties with DNA extraction due to the high energy needed to grind these tissues. Moreover, biological evidence is available in small quantities and the current techniques used do not provide high quality results. The Precellys homogenizers provides high speed sample disruption based ...

  • Quantum dots and nanostructured conducting polymers for biosensing applications

    Numerous methodologies are currently being employed for the preparation of nanomaterials in customised morphologies. In this paper, we outline recent progress in our laboratory to develop nanostructured inorganic semiconductors – quantum dots (QDs), and nanostructured organic semiconductors based on polyaniline (PANI), for biosensing applications. Blue luminescent CdTe QDs were prepared directly ...


    By Inderscience Publishers

  • A geochemical and statistical approach for assessing heavy metal pollution in sediments from the southern Caspian coast

    Abstract: The nearshore marine environment of the Caspian sea is a major repository for toxic metals originating from various sources. Since the persistent toxic metals pose serious health risks this research concentrated on investigating the concentrations and spatial distribution of metals in the nearshore sediments along the Iranian coast of the Caspian sea. Fourteen sampling sites were ...

  • Improving the reliability of closed chamber methodologies for methane emissions measurement in treatment wetlands

    Non-homogeneous mixing of methane (NHM) within closed chambers was studied under laboratory conditions. The experimental set-up consisted of a PVC vented chamber of 5.3 litres of effective volume fitted with a power-adjustable 12 V fan. NHM within the chamber was studied according to fan position (top vs lateral), fan airflow strength (23 vs 80 cubic feet per minute) and the mixing time before ...


    By IWA Publishing

  • Detection of atrazine, alachlor, cyanazine and metolachlor in corn

    MATRIX: Grain corn ANALYTES: Atrazine, Alachlor, Cyanazine, and Metolachlor RANGE OF DETECTION: Atrazine: 20-1000 ppb Alachlor: 20-1000 ppb Cyanazine: 20-600 ppb Metolachlor: 20-1000 ppb MATERIALS: RaPID Assay Kit and Sample Diluent Reagents: methanol (pesticide grade), distilled or deionized ...


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